Ionselect get Change clear by script


Im new at Ionic and now i want to make some little Scripts for beginning.

If have 3 ion-select with some values and if I choose every where one, I want call a function by button press.

The button and function work but I have no idea how I can read the values from all dropdowns and clear all.

After that I want change the entries in the drop-down list by this function to from an array or something else.

Maybe it’s possible with scripts like jquery?

Thanks for help